Patents by Inventor Keith Wetterquist

Keith Wetterquist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Non-dissipative snubber circuit for a switched mode power supply
    Patent number: 5615094
    Abstract: A non-dissipative snubber circuit for a switched mode power supply in which the excess energy generated by the parasitic voltage spike of a freewheeling diode turning off is directed to either the output of the power supply or to ground. A snubber capacitor stores the excess energy and a snubber circuit path is established during on pulses received by the secondary to allow the excess energy stored in snubber capacitor to be directed to the output of the power supply. Alternatively, the snubber circuit path may direct that excess energy to ground.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: March 25, 1997
    Assignee: Power Conversion Products, Inc.
    Inventors: Anthony P. Cosentino, Keith Wetterquist